So I got a 1000mah evod vv a couple weeks ago and I like alright for now for how I vape. The problem is I'm away from home for work for 12 hours minimum. On a full charge it either dies on the way home (45 minute commute) or right when I get home. I started charging it when I can and carry a spare 650mah at work to avoid that problem. I was locking the battery between breaks and stealth vapes but it didn't seem to have any effect on battery life. All of this to ask, do the batteries in the evod/ego etc style constantly use power? I'm sorry this is a total newb question but it seems like batteries shouldn't die just sitting not being used...right? In searching the forum it seemed to me the pcb/regulator deal--newbie sorry--draws power all the time but I wasn't sure just want to know the answer for curiosity sake.